Abstract
The enhancement of light-matter interaction for monolayer graphene is of great importance on many photonic and optoelectronic applications. With the aim of perfect ultraviolet trapping on monolayer graphene, we adopt the design of an all-dielectric nanostructure, in which the magnetic resonance of optical field is combined with an ultraviolet mirror. The physics inside is revealed in comparison with the conventional plasmonic perfect absorber, and various influence factors of absorption bands are systematically investigated. In the ultraviolet range, an optimized absorbance ratio up to 99.7% is reached, which is 10 times more than that of the suspended graphene, and the absorption bands are linearly reconfigurable by angular manipulation of incident light. The scheme for perfect ultraviolet trapping in a sub-nanometer scale paves the way for developing more promising ultraviolet devices based on graphene and potentially other 2D materials.
Highlights
The family of 2D materials has attracted a lot of interest in the field of device research, because they show exceptional electronic and optical properties compared with their 3D counterparts
As the most popular 2D material, graphene is regarded as a promising alternative to silicon for future development of optoelectronics, due to its high carrier mobility, fast optical response, extraordinary band structure, and unique mechanical strength and flexibility [1]
This method is limited by specific angular manipulation of incident light and intrinsic optical loss in the metal
Summary
The family of 2D materials has attracted a lot of interest in the field of device research, because they show exceptional electronic and optical properties compared with their 3D counterparts. In the past few years, many graphene-based photonic devices have been investigated, including solar cells, photonic detectors, optical modulators and optical sensors [2,3,4,5] In these investigations, graphene has shown poor light-matter interaction for its extremely small thickness, and weak spectral selectivity for its wavelength-independent absorption in the visible and near-infrared ranges [6]. A previous effort has been focused on achieving high UV absorption in graphene by using a multilayer structure without any nanostructure patterning [16] This method is limited by specific angular manipulation of incident light and intrinsic optical loss in the metal. An efficient design of photonic structure for normal incidence is essential for developing optoelectronic devices based on graphene
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
